Malicious PDF — malware analysis report

Static analysis result for SHA-256 886d564ebbf5faae…

MALICIOUS

PDF

79.0 KB Created: 2021-04-09 09:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 911c68617482c367f63bc68f9771d38f SHA-1: d4482303d767fef6eca262d9d7688f3baf593e24 SHA-256: 886d564ebbf5faaedeb30fcaa370f4bd44d8f8aa29cd3377870bec9c82442d26
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a primary malicious URL identified at https://mezovuduw.ru/strik. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/strik?utm_term=behringer+q802usb+review PDF link annotation
    • http://riwaxutitono.iblogger.org/rilodivofisibukegeto.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/lixaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5fcf8103b63af.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/ihaichi/jurassic_world_pixel_art.pdfIn PDF document text
    • https://cdn.sqhk.co/wetewajaba/haNDNV5/bentley_car_wallpaper_for_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_601ce537aa6f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_6049bb65af6ed.pdfIn PDF document text
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/3477924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416929/normal_60633d6bd3452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5fef397f55e80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482625/normal_5ffa22cb541bf.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/bG4LBhc/extra_lives_zombie_survival_sim_hack_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_5ff98c0b043a9.pdfIn PDF document text
    • https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/kewidijalamufer-kituxivomizuvi-fuwadozuva.pdfIn PDF document text
    • https://tudaxuvogune.weebly.com/uploads/1/3/6/0/136082380/d6364c484.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/ieNjdic/nujafovekutamukos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_604e0865e2b68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/391a4c1c-b18f-4aa6-ab83-91f640ca17e6/how_to_fix_sud_error_on_whirlpool_duet_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868b6587-9d71-4c37-8e74-ab0145f604f7/como_trabajar_la_inteligencia_emocional_con_adultos.pdfIn PDF document text
    • http://jukikusikodopom.epizy.com/55117303920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d009ad25-ce90-4144-a690-b9235d0b0a09/flowers_in_the_attic_book_age_appropriate.pdfIn PDF document text
    • http://dozafuzap.epizy.com/security_assessment_report_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b04f56-bee5-4d13-b5ba-4a3501a895f4/what_are_the_structured_products.pdfIn PDF document text
    • http://sodebaxekigefip.rf.gd/alcatel_one_touch_pop_4_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa77f3e4-6823-4967-b773-8c1e22dd4377/samsung_6300_washer_dryer.pdfIn PDF document text
    • http://supijidexigoba.epizy.com/dr._esselstyn_diet_guidelines.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF509 5640 bytes
SHA-256: bba9cedee6e3ddbb1391762bdb06a934354055fd1e11234fe1f638a6755c1777
font_01_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 11296 bytes
SHA-256: d1c0de65cbb5e16b0d5292f9523e7a07d1c83a9dd7b113bc9acf46c73ec7c906